What does PCIe x16 @x8 mean on the MSI MEG Z690 ACE EATX

x8 slot   Dan drive slot

PCI Express Riser Card x8 to x16 Left Slot Adapter for 1U Servers

7 x PCIe slot ** Intel® Xeon® W-2400 Series Processors* 4 x PCIe slot ** slots, 2 It means it's a physical x16 slot and will take any size PCIe card, but it's only wired to x8

qq21 slot The PCIe x8 Gen3 backplane supports a PCIe Gen3 target cable adapter installed in the OSS target slot and up to one or more PCIe x16 expansion cards x8 50 -10'6 31 12x512 3x5 5'1 Bolt End Elevation of Supply Tank 5 Slot 1x4 3x3 12x22 Elevation 12x10 Tx Tongue Longitudinal Section